diff options
Diffstat (limited to 'src/cmd/internal/obj/arm64/asm_test.go')
| -rw-r--r-- | src/cmd/internal/obj/arm64/asm_test.go | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/src/cmd/internal/obj/arm64/asm_test.go b/src/cmd/internal/obj/arm64/asm_test.go index 1691828739..9efdb0217f 100644 --- a/src/cmd/internal/obj/arm64/asm_test.go +++ b/src/cmd/internal/obj/arm64/asm_test.go @@ -18,7 +18,9 @@ import ( // TestLarge generates a very large file to verify that large // program builds successfully, in particular, too-far -// conditional branches are fixed. +// conditional branches are fixed, and also verify that the +// instruction's pc can be correctly aligned even when branches +// need to be fixed. func TestLarge(t *testing.T) { if testing.Short() { t.Skip("Skip in short mode") @@ -41,11 +43,28 @@ func TestLarge(t *testing.T) { t.Fatalf("can't write output: %v\n", err) } - // build generated file - cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile) + pattern := `0x0080\s00128\s\(.*\)\tMOVD\t\$3,\sR3` + + // assemble generated file + cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-S", "-o", filepath.Join(dir, "test.o"), tmpfile) cmd.Env = append(os.Environ(), "GOARCH=arm64", "GOOS=linux") out, err := cmd.CombinedOutput() if err != nil { + t.Errorf("Assemble failed: %v, output: %s", err, out) + } + matched, err := regexp.MatchString(pattern, string(out)) + if err != nil { + t.Fatal(err) + } + if !matched { + t.Errorf("The alignment is not correct: %t, output:%s\n", matched, out) + } + + // build generated file + cmd = exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile) + cmd.Env = append(os.Environ(), "GOARCH=arm64", "GOOS=linux") + out, err = cmd.CombinedOutput() + if err != nil { t.Errorf("Build failed: %v, output: %s", err, out) } } @@ -56,6 +75,8 @@ func gen(buf *bytes.Buffer) { fmt.Fprintln(buf, "TBZ $5, R0, label") fmt.Fprintln(buf, "CBZ R0, label") fmt.Fprintln(buf, "BEQ label") + fmt.Fprintln(buf, "PCALIGN $128") + fmt.Fprintln(buf, "MOVD $3, R3") for i := 0; i < 1<<19; i++ { fmt.Fprintln(buf, "MOVD R0, R1") } |